Lever mechanism



Dec. 2, 1930. R MANLEY 1,783,250

LEVER MECHANISM Filed Oct. 5, 1,926 2 Sheets-Sheet 1 Dec. 2, 1930.

R. E. MANLEY LEVER MECHANISM Filed Oct. 15 192 I 2 Sheets-Sheet 2 Patented Dec. 2,, 1930 UNITED STATES PATENT OFFICE i ROBERT E. 1VIANLE Y, OF YORK, PENNSYLVANIA, ASSIGNOR TO MANLEY MANUFACTUR IN Gr COMPANY, OF YORK, PENIISYLVAIQI'IA CORPORATION OF DELAWARE LEVER MECHANISM I Application filed October 15, 1926. Serial Na 141,850. I

This invention relates to screw presses and has for;its object the provision of a simple and eflicient quick detachable auxiliary lever mechanism whereby powerfulpressure can be secured to start relative movement between two pieces.v I

A further object of the invention consists in the provision of a lockingdevice between a horizontal rod and a vertical shaft pivoted thereto. A still further object of the present invention consists in the provision of a counterbalanced pawl and ratchet advancing mechanism for a screw, capable of movement in a plurality of ways to'accomplishvariety of speeds giving inverse power.

In the relatively heavy presses, for ex ample those used in garages, these varying from three to fifty tonsor more, the time alloted a definite piece of work willnot permit the exclusive use of the very'slow speed of a high leverage. It is quite customary to provide a small rack and pinion arbor press, to

one side of the main frame to take care of small work this being an auxiliary tothe central screw which may be adjusted to position by spinning freely and which maythen be moved by a long rod leverage having an option as to the number; of teeth the pawl shall slip over but having no other provision for slow speed highleverage work.

In the device illustrated inthe drawings a very simple form of screw press is illustrated wherein all of the advantages of previous types of the same general nature are n c'ntained and etaver sim lo, and hi lil 1 y y p g y oscillated by a collar 58- having a socket 59 bodying the present invention.

Figure 2 is a plan view of the leverage. Figure 3 is an elevation.

Figure .4 is a PGI'SPBCJDIVG'VIBW of a portion of the leverage shown in Figure 3.

9 The frame of ,therpress-is made up of two multi-piece standards 10 each supported at the bottom by a base 11, these bases being tied together by the straps 14 in the usual manner. The sidebars ofthe uprights continue the'entire height of the press and are secured at their tops to the channel pieces 15 which support the screw press mechanism 20. The table 21 is slidably mounted on the uprights 10 and maybe pinned to'thein at the desired height depending upon the class of work being operated upon.

I Theratchetiwheel 25 is: of old and well known construction as is the screw proper which is I numbered 26 in theydrawings.

.Mounted for rotation, with respect to the wheel is a pawl carrying arm30 having at its far end a counter weight 31 which exactly balances the front end which carries the pawl and also the usual socket 34 to receive a handle or rod 36 which need have no positive connection with the socket. Extending. laterally from the forward end of the pawl carrying arm SO-and on the oppositeside from the socket 34 aretwo integral pierced'lugs 38 receiving loosely-between them a bar 40 which is secured by and-pivoted upon the pin 42 conveniently held in the lugs or ears 38 merelyby gravity. l

Mounted in two brackets 44 and 45 secured to'the near left hand standard 46 (which is part of the upright 10) is averticalshaft 50 carrying at its top a lever arm 51 perforated in a plurality of places as at 52 and 53 and having a ledge 56 which slightlyoverhangs all of the holes, The vertical shaft 50 is twenty degrees so that the arm 51 is slightly leverage is in use. i p

A slide60 is freely movable on the bar 40 but may be held in adjusted position by 'a set screw 61. This slide carries a locking member 62 to lock the bar 40 to the lever arm nearerthe axis of the screw when this super.-

51, this being accomplished in the following 1 manner: The slide is pushed toward the screw and the downwardly directed circular projection 64 on the rod is inserted in one of the holes in the lever arm, 52 for the greatest power, 53 for the somewhat less power and the hole in between for an intermediate leverage and power. \Vith the projection Get in the selected hole the slide 60 is moved until the locking member 62 is beneath the ledge 56 at which time the thumb screw 61 is tightened slightly, absolutely preventing removal of the parts.

We will assume that a very heavy piece of work is to be operated upon requiring the greatest possible power. The projection 64 on the bar 40 is dropped into its pivoting hole 52 and the parts locked into such position by the slide 60. The pin 42 is inserted to connect the auxiliary or vertical shaft 50 with the pawl carrying arm 30. The lever or handle 36 is in the socket 59 which is considerably lower than the pawl and is at a height to be'most convenient to the operator who grasps the rod or lever 86 with one hand and with the other hand holds and sup ports the work under the screw. This method of operating permits the mechanic to exert muscular action in a more efiicient way than with vertical leverage and hence the leverage developed will be greater. When the work is started the pin 42 is slipped out, and the bar 40 thrown to the left, and the lever handle 36 shifted from socket 59 to socket l at which time the action continues as a simple pawl and ratchet movement quite similar to that well known and old except for the fact that the pawl carrying arm is counterweighted, this latter it is believed, being new in this art.

What I claim is 1. In a press, a screw, a member for advancing the screw, a vertical shaft, a pair of arms on said vertical shaft forming with it a bell crank lever, quick detachable means for connecting the screw advancing means and one arm of the bell crank lever so that oscillation of the vertical shaft advances the screw, and means permitting the ready securing and releasing of the connection between said screw advancing means and lover arm.

2. In a screw press, a screw, a wheel for advancing said screw, counterbalanced means pivoted coaxial with the screw for rotating said wheel, a vertical shaft pivoted to one side of said screw, a pair of substantially parallel arms carried by said vertical shaft, one of said arms being a manually operated lever and the other arm being perforated in a plurality of places, a bar having pivotal connection with any one of said perforations and readily detachable means for pivotally connecting said bar to said wheel rotating means.

3. In a press, a screw, a ratchet wheel having threaded engagement with said screw for advancing same, an arm pivoted concentric with said screw and wheel and carrying a wheel engaging pawl, and a counterweight balancing the pawl carrying end of said arm whereby the wheel can be conveniently spun with the pawl.

4. In a device of the character described, a. lever having an overhanging lodge, a bar having a pin and socket connection with said lever, and means freely slidable along said bar and under said overhanging ledge to lock the pin in its socket.

5. In a device of the character described, a vertical shaft, a pivoting support therefor, a pair of horizontal arms carried by said shaft, a bar, a pin and socket connection between said bar and one of said arms, and n'ieans for locking said pin in said socket.

6. In a device of the character described, an interconnected lever and bar quickly detachable from each other, the said lever being pro ed with plurality of apertures adapted to receive the bar. the said lever be ing also provided with a ledge overhanging the said apertures, and a wedge slidahly carried by the bar and adapted to engage the said ledge and bar to secure the contact between the lever and bar.

7. In a device of the character described, a lever movable about a fixed pivot, a bar, quick detachable means for pivoting the bar tothe lever whereby rotation of the lever about its pivot will transmit power ir. the direction of the length of the bar, and means slidable on the bar to prevent movement of the pivoted end of the bar in a direction parallel to the pivotal axis of the lever.

8. In combination, a pawl and ratchet mechanism, a lever, a link pivoted to the lever and to the pawl and ratchet mechanism, and means slidahle along the link to permit and to prevent disassociation of the link and the lever.

f). combination. arin pivoted about vertica axis'and having a plurality of holes therein at varying distances from the axis, a bar having a downturned. portion to L, and pivotally engage any one of said h, and means carried in part by the arm and in part by the bar to prevent accidental removal of the downturned portion when the b..r i lever are in chosen adjusted position.

10. In a press, screw, a wheel for inovii the screw to and from the work, a pair. ratchet mechanism for turning: the step by step, a count valance for no, men of said mechanism. means for ii-di f disconnecting by hand a portion of said pawl and. ratchet mechanism, whereby the wheel may be rotated by hand to carry with it counterbalanced portion of the a ratchet mechanism as to advance or retract the screw with rapid motion.

In testimony whereof I afiix my signature.

ROBERT E. MAI? LE1. 13o 

